drm/ttm: Add ttm_bo_kmap_try_from_panic()

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If the ttm bo is backed by pages, then it's possible to safely kmap
one page at a time, using kmap_try_from_panic().
Unfortunately there is no way to do the same with ioremap, so it
only supports the kmap case.
This is needed for proper drm_panic support with xe driver.

Signed-off-by: Jocelyn Falempe <jfalempe@redhat.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://lore.kernel.org/r/20250624091501.257661-6-jfalempe@redhat.com
Signed-off-by: Maarten Lankhorst <dev@lankhorst.se>

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Jocelyn Falempe 2025-06-24 11:01:14 +02:00 • committed by Maarten Lankhorst

parent 796f437d7b

commit 718370ff28

2 changed files with 28 additions and 0 deletions

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27

drivers/gpu/drm/ttm/ttm_bo_util.c

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1

include/drm/ttm/ttm_bo.h

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